Device for measuring the free chloride content of water
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United States of America Patent
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Dec 6, 2016
Grant Date -
Mar 12, 2015
app pub date -
Jul 25, 2012
filing date -
Jul 25, 2011
priority date (Note) -
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Abstract
An amperometric sensor circuit for measuring chlorine concentration in water. The circuit includes first and second working electrodes coated with a hydrophilic membrane. A power supply and biasing circuit is configured to deliver a generally constant voltage between the first working electrode and a reference electrode and to generally deliver a constant current between the second working electrode and a counter electrode. A measurement circuit measures the current between the counter electrode and the first working electrode. A processing circuit is provided for determining the chlorine concentration based on the current measured by the measurement circuit.
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